Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
It is not obligatory upon a Muslim to name himself a Salafi because Allah, The Most-High, called us Muslims. This is the juristic name to which any person who believes in Allah and his Prophet (Sallallahu Alaihi wa Sallam) belongs. The name that Allah has given us is sufficient for us.
However, there is no harm on whoever affiliates himself to the Salaf – our pious predecessors – and say that he is a Salafi. It is most important that a Muslim follow their methodology, belief and actions.
The crucial factor is what a Muslim is upon not what name he is given.